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C.v H'. RECHMANN. Lamp Chimney.

CHARLES -l REICHMANN, OF NEW YORK, N. Y.

Letters .Patent No. 60,987, dated January 1, 1867.

IMPROVEMENT IN LAMP HIMNEYS.

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TO ALL lli/'HGM MAY GONGERN:

Bc it known that CHARLES H. REIciIMANN, of the city, county, and State of N ew York, have invented a new and improved 'Glass Chimney for Lamps; and I do hereby declare that the following is a full, clear, and exact description ther-cof, which will enable those skilled 'in the art to make and use the same.

The drawing represents a sectional elevation of my invention. V

The object of this invention is to obtain a `glass draught chimney for lamps, whichV will not be liable to break or 'fracture under expansion due to the heat oi' the llame. Glass chimneys, as at present constructed, break or fracture under unequal expansion, the upper part of the chimney, being heated much more intensely than the -lower part, expands in a proportionately greater degree, and fractureis the result. I design to obviatc this ditlicuvlty by constructing the chimney in two sections, connected'togcther in such-amanner as to form secure-and close joints, and which will admit of said sections -.or parts expanding separately or independently of each other, as hereinafter fully shown and described. l n 4 In the present example the chimney is shown constructed of two parts, A, B, both of glass. The lower part, A, :corresponds in form to the lower parts of the ordinary glass chimneys in use', and may be secured upon the burner in any of the known ways. The upper end of this part A curves outward to form a ilange, a, as shown clearly in the drawing.V The upper part, B, of thc chimney may be of cylindrical, conical, or other proper form,l and has its lower end curved outward to form a flange, b. This flange, b, rests upon the flange a -of the lower part, A., of the chimney, and saidI flanges are encompassed by a metallic band, C, the upper part of which -is bent over llange b of B, andthe lower part indented externally to form projecting spurs, c, at its inner 4side -to llt under the flange a, of the part A, and secure the two parts A, B, together. This band need not be wider thanI just enough to clasp both ilanges, and is too narrow to o`er`any serious obstruction to the light. It is not designedto have the metallic band, C, tit tightly around the parts A, B, but loosely, so that either part may expand freely and independently oi' each other and the band C. Hence it will be seen that the upper part, B, which is heated in a much greater degree than the lower part, A, may expand proportionably more, without at all alfecting A, while thecomparatively slight expansionoi` .A will not affect the part B. The breaking or fracturing of glass lamp chimneys from the cause above stated, renders the burning of coal oil and other similar hydro-'carbone rather eirpensiye and veryiannoying. Many plans have been devised to obviate the difficulty. Mica chimneyshave been used, but they have proved aV failure, as they soon become discolored by the lo'dgment of unconsumed carbon between the laminas, and will not bear the friction of a cloth or cleaner; besides, it is very dilicult to obtain mica in suiliciently large sheets and of good quality. Chimneys have also been constructed with sheet-metal tops and glass lower parts. These, so far as breakage from unequal expansion is concerned, have proved to be a success, but they have not come into general use on account of obstructing the light. They will answer for lamps to read or sew by, but do not give that cheerful light which is required for the general illumination of a room. I

My invention, it will be seen, possesses the advantage of the combined metal and glass chimney,l and at the same time will not obstruct the light as is the case with the former, not any moi-c than the ordinary glass chimney blown or moulded in one piece.

I am aware that projections have been made on theupper. side of thc lower part of chimneys constructed in parts, which projections catch and slide in a groove on the inside of the metalband, necessitating a certain position of all parts to be litted together, but in -my invention the two parts A, B, may be connected and disconnected at any time, even in 'the darkwith the greatest ease, as no particular position of the parts is necessary to insure a complete fitting together of the same, the metal band being simply slid over the upper part until it rests on tho flange of the same, and then sprung over the flange of the lower part.

In this way the chimney may be taken apart and cleaned with rags without requiring a. long wiper, which often causes the breaking of the chimney.

Having thus described my invention, I claim as new, and desire to secure by Letters Patent- A glass chimney for lamps, constructed of two sections, the adjoining parts of which are provided with flanges a held together by a narrow vrectal band, slipped over the upper part and resting on its ilange, and sprung over the. flange of' the lower part.

CHAS. H. REICHMANN. Witnesses:

M. M. LrvINesroN, WM. EI LYoNs. 

